Sound transmitter and receiver.



lA'.J.'MUNDz.-, SOUND TRANSMITTER AND B EGB- Ivn.'

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,PATETBD AUGQ 23,

ARTHUR J. MUNDY, F iisTcNf, n fr'ssiicnusarrs;assiettes' Toscana'- inna sniNaL coa-tram', oa newsvine- Manns- OF MAJNE.

SOUND rRAN-simTreaaNipjnetten/En.

' .APatentcd-August 23,

CalamaMaori SPECIFICATION fmming para of Letter patatina-fressen,.dd'augu 23, 1964,

Applicant and tra 23,1902..

To (1,21 whom it 1v1/ay concern:

Be it known that LARTIIURJ. Mamma citizen of the United States. andV a" resident of Boston, in the county of Suffolk and State of.

5 Massachusetts, have invented a new and use ful Improvement in Sound Transmitters and Receivers` of which the following is a fuil` clear., and exact description, reference being had to the accompanying drawings, forming lo a part of this specification` in explaining its nature.

The invent-ion relates to the transmission of articulate speech by water.

I have ascertained that an open body of 1 5 water-like, for instance, thc water of a pond,

river, or sea-may be employed for receiving' lthe vibrations of articulate speech` may transfcr such vibrations. and deliver them. to an electrical transmitter submerged in the water. zo by which they may be transmitted electrically to a receiver located o'ut ci the water and at any desired distance from the submerged trans mitter.

In practicing the invention the vibrations of articulate speech are delivercd'by asubmerged vibrator;r diaphragm with which the transferring water is in contact, and the vibrations thus transmitted to thewvater' are received by a transmitter of peculiar construction which is submerged in' the water and which transfers them electrically to a receiver.

ln the drawings l have represented in a conventional way the means for practicingmy invention.

Figure 1 is a view of my transmitting and receiving apparatus in partial cross-sectional elevation. Fig, 1I is a detail view1 in crossscctional elevati on. of my receiving apparatus.

Referring to the drawings` A represents a 4 rihratory diaphragm submerged in the water to any desired depth and upon one side in Contact with the n ater. This diaphragm i's vibrated b v means of the sounds of articulate speech delivered to it through a speakingtube (L and from the mouthpiece a.' thereof.

l prefer that there be between the lower end sam nu. mason'. f ci man.)

of the spcaltin`glgftubeand the diaphragm A an enlarged chamber van" from which opens a chamber a, filled with a sound=absorbent and l adapted to prevent excess of sound-revei'bcra- 59 tion in the chamber a. The chamber a has an'cnlarged end which is covered by the vi. .l

bratory diapllragm, and thus permitsof the employment of a'diaphragm of any required size. The chamber a. may not be usedi The 4 chamber a 1s somewhat 1n the nature of -,a.

megaphone, which acts to receive the sound and intensify it during its passage to its der livery end, so that the diaphragm is actuated with that intensity which this construction 601 implies. The water in which the v ibratory'l diaphragm 1s submerged maybe, as I have said, any bod-y of natural 4 water-such as a pond` river, 'or sea or any other' uncontined'v- 'water-and the4 extent i-ojvhich lt will deliver 65 the sound-vibrations depends upon` thentensity with which they are delivered to the water and the sensi-tiveness of the soundtransmitter upon whiclrthe sound-vibrations thus imparted to the water operate or come' into 70 'l contact. B represents the water for so transmitting the vibrations of articulate speech.

C is the submerged transmitting device.' It preferably comprises an electrical transnntter,'

one like tliatdescribed in either of my appli- 'l5' cations for Letters Patent of the United States executed of even date herewith, Cases B and F, and contaiued in a sound-focusing shell like that described in luyapplication for-Letters Patent of the United States executed of 36.

even date. herewith, Case E. The transmitter is electrically connected with the receiver l).

' A transmitter cf this character intensifies the sound-vibrations delivered by it to the water both by focusing the vibrations upon'the dia- 8s phragms by the direct contact of vibratory water with the diaphragmsand by the simultanecus use of :1 number of sound-receiving dlaphragms subject to lhe same iulluences and connected in series or' multipleI with the rc- .9d

eciver, so thiitthe transmitter isahle to take from the water the vibrations of articulate" l speech .zicliveredito the water and to transmit Ilwm directly to the receiver by which articulate. speech is delivered.

Haring thus fully described my invention '.forjniparting to the water n't a point hclo l claim and desire to secure by Letters Patent (if tlli Unltcli SibCS-- l. ln a system of submarine telephony, a mcnns for imparting to water at a point beneath its surface the vibrations of articulateI sprech, and a submerged electric transmittert und receiver adapted to receive said vibrations so imparted to the water and tc electrically, transmit them to a sound-receiver.

2. In a system fors'ubmarine transmission of speech, a. submerged means for imparting to wnte'rat a point beiowits surface the 'vi-- brntions of articulate speech, and a. sn brnerged electric Atransmitter and receiver for taking said'vibrations from the water and transmitting them comprising `a submerged electric transmitter, means for focusing sound-vibn tions thereon, and'a receiver electrically cor necked .with the transmitter;

3. In a submarine telephonie system, mbar,

itssmface the vibrations of articulate spcvcl and .a means for taking s'ucll vibrations frm the water. the saine comprising a submcrgvi' electric' transmitter of the character speci liuc undl a receive in .electric connection there wit 1'. I

4. l-n a submarine telephonie system, mean for imparting to the -water ata point beloi :ts surface the vibrations of sounds emittc Awithout, and means for taking such vibration from thewarat n distance:

ARTHUR J. MUN DY. Witnesses: t

F. F. RAYMOND, 2d, f

J.. M. DoLAN.' 'f 

